Internal Power rale of CCG3PA

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TeMa_2997106
Level 6
Level 6
Distributor - TED (Japan)
10 likes received 10 solutions authored 250 replies posted

外部からVDDDを供給した場合、VBUS_IN_DISCHARGEは外部で切断してもよいでしょうか。

SHV RegulatorをOFFにしさえすればよいのでしょうか。

その時、VBUS_C_CTRLの電源供給源は何になりますでしょうか。

外部電源入力源に関係なくVBUS_C_MON_DISCAHRGEなのでしょうか。

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Is it possible to disconnect VBUS_IN_DISCHARGE externally when VDDD is supplied from the outside?

Is it all right if it only disable the SHV Regulator?

At that time, where is the power supply for VBUS_C_CTRL taken from?

Does VBUS_C_MON_DISCHARGE need to be supplied?

CCG3PA_PowerRale.jpg

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1 Solution
Sananya_14
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

Yes, please dont connect VBUS_IN_DISCHARGE when you have VDDD connected to externally and disable the regulator.

All the I/Os will be powered form VDDD in that case including VBUS_C_CTRL. You could connect VBUS_C_MON_DISHARGE to the VBUS on the Type-C connector to monitor it. Please refer to Figure 9 in the datasheet for power bank application, it shows an example of the device being powered from VDDD when acting as a sink.

Best Regards,

Sananya

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4 Replies
Sananya_14
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

Yes, please dont connect VBUS_IN_DISCHARGE when you have VDDD connected to externally and disable the regulator.

All the I/Os will be powered form VDDD in that case including VBUS_C_CTRL. You could connect VBUS_C_MON_DISHARGE to the VBUS on the Type-C connector to monitor it. Please refer to Figure 9 in the datasheet for power bank application, it shows an example of the device being powered from VDDD when acting as a sink.

Best Regards,

Sananya

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TeMa_2997106
Level 6
Level 6
Distributor - TED (Japan)
10 likes received 10 solutions authored 250 replies posted

Sananya-san,

Thank you for your reply.

If VBUS_IN_DISCHARGE connect external when it have VDDD supply, what is occured fatal problem?

It is connected to VBUS_IN_DIS at current board.

Thanks,

Tetsuo

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Hi Tetsuo-san,

If you connect both VDDD and VBUS_IN_DISCHARGE, you will be shorting the output of the internal regulator to your external supply and back powering it and it might damage the chip. When the external VBUS_IN_DISCHARGE is connected, the regulator generates 3.3V on the VDDD pin so it shouldnt be used as an input.

Best Regards,
Sananya

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TeMa_2997106
Level 6
Level 6
Distributor - TED (Japan)
10 likes received 10 solutions authored 250 replies posted

Sananya-san,

Thank you for your reply again.

I understand.

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